Being a bridesmaid is not an extracurricular activity and giving blood once a year is not a volunteer activity…

…and surfing the Web is not a hobby. Be careful about the impression that activities like this will make on members of the admissions committee. They are looking for substantial, quality experiences that tell them something about who you are and the things that you are passionate about. The activities that you list should reflect your interests and serve as a possible indicator of how committed you are to service work, how well you work with others, and how well you manage your time.

If you consider giving blood once a year a volunteer activity, then you had better get out there and get some additional volunteer experiences. Although this is a good start, it really does not say enough about your dedication to serving others and your drive to be a physician. It is viewed as “the right thing to do” but is not going to be enough to prove your dedication to serving others.